Once that velvet comes off, he will look like a typical spike I have seen many of. QDM practices used to proclaim that culling spikes based on their appearance was a way to selectively pull out the spikes that don't look to have potential. That theory has been proven wrong.
Steve Bartylla talks about bucks that stall out antler development wise at age 3, then there are bucks that take significant jumps age 3 to 4.